What is the cubed root of 8?

Question

10712 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-05-09T20:43:06

#root(3)8=2#

The cube root of #x# (denoted by #root(3)x#) is a number that you multiply by itself three times to get #x#.

The cube root of #8# is #2#, because:

#2*2*2=4*2=color(red)(8)#

You can also use exponents:

#2^3=2^2*2^1=4*2=color(red)(8)#

Answer 2 · 2018-05-09T20:44:56

#root(3)8= (8)^(1/3)=(2^3)^(1/3)=2#

show that #8=2^3#

cubic root of x equals #x^(1/3)#

cubic root of 8 equals #(8)^(1/3)=(2^3)^(1/3)=2#

note that

#(x^n)^m=x^(n*m)#